you can limit travel anywhere between the 2" minimum and 4" maximum to match the damper's full-open/full-closed rotation

25 to 135 Amps

Rated for 35 amp contact rating at 480 VAC

The Resideo VR8300A4508 is a professional-grade 3/4" 24VAC standing pilot dual automatic combination gas valve engineered for single-stage heating systems

This part usually includes the necessary mounting interface

Lochinvar & A.O. Smith 100277770 Control 322055-301 you can limit travel anywhereThe Lochinvar & A. O. Smith 100277770 Control is a critical integrated control board engineered for high output commercial boilers, specifically the FB1501 2001 series. As an essential OEM replacement part, this module manages the full ignition sequence, blower speed regulation, and safety circuit monitoring to ensure peak thermal efficiency. It is compatible with Power Fin and Crest models, including the FBL1501, FBL1751, FBL2001, FBN1501, FBN1751,